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United States Patent | 5,763,133 |
Ong ,   et al. | June 9, 1998 |
A process for the preparation of toner comprising (i) blending (a) an aqueous pigment dispersion containing a first ionic surfactant and an optional charge control agent with (b) a latex blend comprised of linear polymer and crosslinked polymer particles, optional nonionic surfactant and a second ionic surfactant with a charge polarity opposite to that of said first ionic surfactant in said pigment dispersion; (ii) heating the resulting mixture at about below the glass transition temperature (Tg) of the linear latex polymer to form toner sized aggregates; and (iii) subsequently heating said aggregate suspension about above the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates.
Inventors: | Ong; Beng S. (Mississauga, CA); Mychajlowskij; Walter (Georgetown, CA); Kmiecik-Lawrynowicz; Grazyna E. (Fairport, NY); Patel; Raj D. (Oakville, CA); Sanders; David J. (Oakville, CA); Drappel; Stephan V. (Toronto, CA) |
Assignee: | Xerox Corporation (Stamford, CT) |
Appl. No.: | 825451 |
Filed: | March 28, 1997 |
Current U.S. Class: | 430/137.14; 430/109.3 |
Intern'l Class: | G03G 009/087 |
Field of Search: | 430/137,107,110 |
4797339 | Jan., 1989 | Maruyama et al. | 430/109. |
4983488 | Jan., 1991 | Tan et al. | 430/137. |
4996127 | Feb., 1991 | Hasegawa et al. | 430/109. |
5278020 | Jan., 1994 | Grushkin et al. | 430/137. |
5290654 | Mar., 1994 | Sacripante et al. | 430/137. |
5308734 | May., 1994 | Sacripante et al. | 430/137. |
5344738 | Sep., 1994 | Kmiecik-Lawrynowicz et al. | 430/137. |
5346797 | Sep., 1994 | Kmiecik-Lawrynowicz et al. | 430/137. |
5364729 | Nov., 1994 | Kmiecik-Lawrynowicz et al. | 430/137. |
5370963 | Dec., 1994 | Patel et al. | 430/137. |
5403693 | Apr., 1995 | Patel et al. | 430/137. |
5418108 | May., 1995 | Kmiecik-Lawrynowicz et al. | 430/137. |
5585215 | Dec., 1996 | Ong et al. | 430/137. |
5650256 | Jul., 1997 | Veregin et al. | 430/137. |